hi tim same here 25 years
same problem with vcr and digitor tv
found all my problems were electrolitic caps
checked with ohm meter no problems found
bought a meter to check the series electrical resitence
with the new meter it said they were way too hight replaced them and it fixed both set
yet the multimeter says component are right just as taught back in the sixties
good luck
try esr in search engine for meter kits or full sets
rainer@froggy.com.au
rainer
August 2008